0.965" 20mm EP with crosshairs

[Stub Mandrel]

I can't seem to find such a thing on the net. Needs to be 20mm (or very close) as it's for a finderscope. I got a 20mm EP cheap of ebay, but the focus point is behind the front lens so adding crosshairs is an impossibility!

Can anyone point me ata suitable (and cheap) solution?

[Stu]

There's a 0.965" to 1.25" diagonal for £8 on Astroboot, could you do anything with that or do you need/have a correct image prism?

[John]

A low cost 20mm plossl or kellner should have the field stop accessible and you could add a pair of cross hairs by supergluing some of the thinnest fishing line you can get to the field stop or even human hairs !

Plossls in the .965" format are quite hard to come by but kellners do crop up.

 

 

[estwing]

telementor had one as standard...the crosshair insert is on the right...

[Stub Mandrel]

10 hours ago, Stu said:

There's a 0.965" to 1.25" diagonal for £8 on Astroboot, could you do anything with that or do you need/have a correct image prism?

Thanks, but that would mean lopping another 2" off the barrel of the scope. I do have a correcting prism for it, but I get on well with inverted view.